That's as much B.S. as the the Yahoo link. You're using deductive reasoning with huge problems with internal validity to answer a question of causality that should be tested through statistical empiricism with controlled confounds. Unless, of course, you're being sarcastic. In that case...
Though to be fair, the spanking study is probably a legitimate study that's reported in a reputable peer-reviewed psychological journal in which the principal investigator recognizes that she found a correlation between spanking and IQ. She may have even built a regression model with her findings. The mainstream media jounalist just latched onto it, igorned the difference between correlation and causation, and reported it as "OMG!!! neW SuDy finDz spaNkin' yer KidZ makeZ them stuPiDer!!!!"